Fix two typos on heat-translator documentation
Fix two typos on heat-translator documentation

Transalator => Translator
hellow => hello

Change-Id: I17326a6977b061e15c45988658fc52b06d03ed38
Closes-Bug: #1481168

openstack/heat-translator,openstack/heat-translator,openstack/tosca-parser,openstack/tosca-parser